Improvement in molds for casting needle-threaders



UNITED STATES PATENT OFFICE.

S. S. BURLINGAME, OF VARVIOK, RHODE ISLAND.

IMPROVEMENT IN MOLDS FOR Specification forming .To all whom it' may concern:

Be it known that I, S. S. BURLINGAME, of W'arwick, in the county of Kent and State of Rhode Island, have invented a new and Iniproved Mold for Casting Needle-Threaders; and I do hereby declare that the following is a full, clear, and exact description of the same, reference beinghad to the accompanying drawings, forming a part of this specication, in whichv Figure 1 represents a front invention, one jaw being turned down so as to compose the interior of the mold. Fig. 2 is a plan or top view of the same when closed and ready to receive the metal.

Similar letters of reference in both views indieate corresponding parts.

To enable those skilled in the art to make and use my invention, I will proceed to describe its construction and operation with reff erence to the drawings.

My mold consists of two jaws, A B, hinged together by means of pivots a, and operated by handles C. Each of the jaws contains onehalf of the mold, and the jaw A is furnished with two sliding pistons or core-pieces, b, which may be operated by hand-levers D, or in any other convenient manner. These pistons serve to form the bell-shaped holes in the ends of the needle-threaders, which receive the needles, and which terminate in small holes running transversely through the body of the needle-threader to receive the thread. These holes are formed by small core-pins c in the jaw A and by pointed conical core-pins c in elevation of my I CASTING NEE'DLE-THREADERS.

part ofLetters Patent No. 29,230, (lated July 24, T860.

the jaw B and by the shape of the core-pins c. The mouth of these holes is also made bellshaped, to facilitate the introduction of the thread. Two small recesses, d, near to the center of the jaw A, produce the two pins or rivets necessary to fasten down the plates on the face of the needle-threaders, so that when the needle-threader is cast nothing remains to be done but to fasten thi er is ready fornse.

The operation is as follows: If it is desired I to .use my mold, the two jaws are closed up tightly, the sliding pistons b are pushed in until their points strike the core pins c, and melted metal is poured in. As soon as it is cooled off a little the pistons b are drawn out, leaving the bell-shaped holes in the ends, the jaws are opened, and the th is taken ont. l

It is obvious that by means of this mold a can be produced in a short time, and I am enabled, therefore, to sell the same at a very low price, so as to bring it in reach of the poor as well. as the rich.

Having thus described my invention,I claim as new and desire to secure by Letters Patent as an improved article of manufacture- A mold for casting needle-threaders, made and constructed as herein shown and described.

S. S. BURLINGAME. Witnesses GEO. W. SHELDON, J. WV. HILL.

s plate, and the threadj reader, ready cast,

very large quantity of such needle-threaders 

